Nice game. It was slightly confusing to start with as I put the virus under the pipe but nothing happened. I had to watch your video to see it just needed moving slightly and the 'bar' would start to move.
It would be nice to see a 'congratulations' message if you manage to complete each level. On one, I ran out of time at the exact moment the last virus exploded but I didn't know if I did it or timed out.
The time allowed was quite generous on the later levels. I thought it could be shorter in order to make it more difficult.
Can you vary the time it takes to fill each virus? I was thinking you could have a level where you need to do them in a certain order (do the slowest first otherwise you will run out of time).
Thanks for sharing.